@misc{indiciae31462fee050c,
  title = {Redefinition of the crater-density and absolute-age boundaries for the chronostratigraphic system of Mars},
  author = {S.C. Werner and K. L. Tanaka},
  year = {2011},
  doi = {10.1016/j.icarus.2011.07.024},
  url = {https://pubs.usgs.gov/publication/70034654},
  note = {Source identifier: 70034654}
}